Climate change, coastal engineering and risk management
Since 2008 extensive consultative projects have been undertaken in response to concerns about erosion of beaches and flooding events in coastal areas. This work has been overseen by an Integrated Assessment Project Manager within Council and was supported by a steering committee with representatives of the Council and from Commonwealth and State Government agencies.
An over-arching integrated assessment of climate change risks on coastal areas was completed in 2009 and included:
- consultation with community groups, institutions, state government agencies re their awareness and response to climate change issues
- assessment of localities and infrastructure which may be vulnerable to coastal hazards, both at present and into the future under anticipated sea-level rise
- investigation of adaptive management options in response to present and future coastal hazards
- preparation and execution of a communication plan to inform the community of the findings, initiate discussion about proposed responses and obtain feedback
Reports arising include:
- Climate Change Impacts on Clarence Coastal Areas – December 2008
- Coastal Processes, Coastal Hazards, Climate change and Adaptive Responses for preparation of a Coastal Management Strategy for Clarence City, Tasmania
- Winter 2011 Storm Events WRL Report
- Climate Change Impacts on Clarence Coastal Areas – Special Edition Newsletter
- James Carley (UNSW Water Research Laboratory) – Climate Change, Coastal Hazards and Abatement Strategies in Clarence
Climate change coastal impacts and adaptation consultations and planning
Community and partner consultations have been extensive and strategic review and update of Coastal Policy and Planning is ongoing.
- Clive Attwater (SGS Economics and Planning) – Project Outline and Policy and Planning Proposals
- Tasmanian Coastal Adaptation Pathways Project – Lauderdale Recommended Actions – May 2012
- Investigation of Roches Beach Protection Works – WRL Technical Report 2012-09 – June 2012
- Tasmanian Coastal Adaptation Decision Pathways Project: Inundation Control Works for the Lauderdale Area – June 2012
- Models for Funding and Decision Making for Coastal Adaption Pathways – May 2012
- Lauderdale environmental assets: assessment of climate change impact on coastal and marine areas – May 2012
- Tasmanian Coastal Adaptation Pathways Project – Lauderdale Scenario Planning Summary – March 2012
- TCAP Project Brochure
- TCAP Pathway Scenario 1
- TCAP Pathway Scenario 2
- TCAP Pathway Scenario 3
- TCAP Pathway Scenario 4
- Coastal Hazards – Adaptations – Part 1
- Roches Beach coastal hazard lines reassessment
- Lauderdale and Roches Beach land ownership map
Monitoring of changes to Clarence coastal areas
Beach erosion and coastal changes are monitored closely by council officers, through local citizen science contributions (the Tasmanian Shoreline and Monitoring Project TASMARC) and by extensive annual aerial photogrammetric monitoring of Clarence shorelines.
The links below show examples of this monitoring from 2013 to 2017:
- Beach sand profile at Roches Beach – Report
- North of Bambra Reef at Roches Beach – beach sand profile
- Roches and Cremorne Beaches – habitat mapping bathymetry and sediment analysis – dune nourishment
- Beach Monitoring Report 2013
- Beach Monitoring report 2017
- Beach Monitoring 2018
The results from the 2016-17 survey show an easing of the rate of shoreline retreat at the majority of study sites.
The 2014-15 photos reveal the continued establishment of incipient dunes and associated vegetation along many of the beaches continuing a partial stabilisation of the shorelines since the 2011 erosion event.